GB1052455A - - Google Patents

Info

Publication number
GB1052455A
GB1052455A GB2434463A GB2434463A GB1052455A GB 1052455 A GB1052455 A GB 1052455A GB 2434463 A GB2434463 A GB 2434463A GB 2434463 A GB2434463 A GB 2434463A GB 1052455 A GB1052455 A GB 1052455A
Authority
GB
United Kingdom
Prior art keywords
oxide
weight
mol
per cent
strontium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2434463A
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of GB1052455A publication Critical patent/GB1052455A/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/2608—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead
    • C04B35/2633—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead containing barium, strontium or calcium

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Soft Magnetic Materials (AREA)
  • Magnetic Ceramics (AREA)

Abstract

1,052,455. Magnetic compositions. SIEMENS & HALSKE A.G. June 19, 1963 [June 25, 1962], No. 24344/63. Heading H1H. A ferromagnetic manganese zinc ferrite having a maximum permeability greater than 8000 and a ratio of maximum permeability to initial permeability of about 3 to 4 includes one of the following oxides or oxide mixtures. 0À2 to 0À6% by weight of calcium oxide or 0À07 to 0À35% by weight of strontium oxide or 0.02 to 0À08% by weight of barium oxide or 0À03 to 0À07% by weight of silicon dioxide or 0À1 to 0À4% by weight of a mixture of equal parts by weight of strontium oxide, lanthanum oxide, niobium oxide and antimony oxide or 0À1 to 0À4% by weight of a mixture of equal parts by weight of strontium oxide, lanthanum oxide, niobium oxide, antimony oxide, and vanadium oxide and is coarsely crystalline, at least 5% of the crystal grains having a size from 50 to 600 microns. In preparation the main materials which may comprise 50-60 mol. per cent Fe 2 O 3 , 20-45 mol. per cent Mn 3 O 4 and 5-30 mol. per cent ZnO, are presintered at 900‹ C. for one hour. The product is mixed with the addition, ground, pressed into shape, sintered at about 1280‹ C. for 3-12 hours in N 2 or N 2 containing 7% O 2 , and cooled at 100‹ C. per hour. Reference has been directed by the Comptroller to Specification 776,710.
GB2434463A 1962-06-25 1963-06-19 Expired GB1052455A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES0080058 1962-06-25

Publications (1)

Publication Number Publication Date
GB1052455A true GB1052455A (en) 1966-12-21

Family

ID=32666708

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2434463A Expired GB1052455A (en) 1962-06-25 1963-06-19

Country Status (2)

Country Link
FR (1) FR1358126A (en)
GB (1) GB1052455A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2022778A1 (en) * 1969-05-09 1971-03-18 Nippon Electric Co Manganese-zinc ferrites
US5143638A (en) * 1990-03-03 1992-09-01 Kawasaki Steel Corporation Low power loss mn-zn ferrites

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2022778A1 (en) * 1969-05-09 1971-03-18 Nippon Electric Co Manganese-zinc ferrites
US5143638A (en) * 1990-03-03 1992-09-01 Kawasaki Steel Corporation Low power loss mn-zn ferrites
US5368763A (en) * 1990-03-03 1994-11-29 Kawasaki Steel Corporation Low power loss Mn-Zn ferrites

Also Published As

Publication number Publication date
FR1358126A (en) 1964-04-10

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